Two wildfires burning in the western United States — including one that has become a “megafire” on the North Rim of the Grand Canyon — are so hot that they’re spurring the formation of “fire clouds” ...

The US president has given Moscow until August 8 to end the conflict, but says he doubts this will change Putin’s behaviour.

Mars remains an evening fixture, Saturn is nearing opposition, and Venus and Jupiter meet in the predawn sky Aug. 12.